Modelo.AlumnoDAO.java Source code

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Here is the source code for Modelo.AlumnoDAO.java

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/*
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 */
package Modelo;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import Mapeo.Alumno;

/**
 *
 * @author luis
 */
public class AlumnoDAO {

    private SessionFactory sessionFactory;

    public void setSessionFactory(SessionFactory sessionFactory) {
        this.sessionFactory = sessionFactory;
    }

    /**
     * Mtodo que guarda una alumno en la base de datos
     * @param alumno 
     */
    public void guardar(Alumno alumno) {

        Session session = sessionFactory.openSession();
        Transaction tx = null;
        try {
            tx = session.beginTransaction();

            session.persist(alumno);

            tx.commit();
        } catch (Exception e) {
            if (tx != null) {
                tx.rollback();
            }
            e.printStackTrace();
        } finally {
            session.close();
        }

    }

    /**
     * Mtodo que actualiza a una alumno en la base de datos
     * @param alumno 
     */
    public void actualizar(Alumno alumno) {

        Session session = sessionFactory.openSession();
        Transaction tx = null;
        try {
            tx = session.beginTransaction();

            session.update(alumno);

            tx.commit();
        } catch (Exception e) {
            if (tx != null) {
                tx.rollback();
            }
            e.printStackTrace();
        } finally {
            session.close();
        }

    }

    /**
     * Mtodo que elimina a una alumno de la base de datos
     * @param alumno 
     */
    public void eliminar(Alumno alumno) {

        Session session = sessionFactory.openSession();
        Transaction tx = null;
        try {
            tx = session.beginTransaction();

            session.delete(alumno);

            tx.commit();
        } catch (Exception e) {
            if (tx != null) {
                tx.rollback();
            }
            e.printStackTrace();
        } finally {
            session.close();
        }

    }

    /**
     * Mtodo que regresa a una alumno, cuyo id es el que se pasa como 
     * parmetro
     * @param idAlumno
     * @return 
     */
    public Alumno getAlumno(long idAlumno) {
        Alumno alumno = null;
        Session session = sessionFactory.openSession();
        Transaction tx = null;
        try {
            tx = session.beginTransaction();
            alumno = (Alumno) session.get(Alumno.class, idAlumno);
            tx.commit();
        } catch (Exception e) {
            if (tx != null) {
                tx.rollback();
            }
            e.printStackTrace();
        } finally {
            session.close();
        }
        return alumno;
    }

}